In the world of piping systems, flanges are indispensable components. Whether you're building an oil pipeline, assembling a pressure vessel, or working on HVAC systems, flanges allow for safe, secure, and maintainable connections between pipes and equipment.
Why Flanges Matter in Industrial Piping
Flanges provide easy access for cleaning, inspection, or modification of piping systems. They are used to connect pipes, valves, pumps, and other equipment. The type of flange used—weld neck, blind, slip-on, threaded, or lap joint—depends on pressure requirements, fluid type, and piping design.
Weight Chart 1: Stainless Steel Weld Neck Flanges (ANSI B16.5)
Size (inches) | Class Rating | Weight (kg) | Face Type |
2” | 150 | 4.2 | Raised Face |
4” | 300 | 13.6 | RF |
6” | 600 | 32.8 | RTJ |
10” | 150 | 40.2 | RF |
Explanation:
Weld neck flanges are ideal for high-pressure systems. Their tapered hub offers strength during stress and vibration. In this chart, as both the size and pressure class increase, so does the weight. Materials like SS 304, 316, and 321 are available at Pipex.ai, providing options for corrosive environments like chemical plants or marine settings.Weight Chart 2: Carbon Steel Blind Flanges (ASME B16.5)
Size (inches) | Class | Weight (kg) | Typical Application |
1” | 150 | 2.1 | Pipeline Testing |
3” | 300 | 10.3 | Isolation Flange |
6” | 600 | 36.0 | Pressure Vessel Ends |
8” | 900 | 62.4 | High-Pressure Pipelines |
Explanation:
Blind flanges are used to close the ends of piping systems or pressure vessels. These flanges bear significant pressure and weight. Pipex.ai offers them in ASTM A105, A350 LF2, and more, with mill test certificates and dimensional verification. They are widely used in petrochemical and high-pressure water systems.
Weight Chart 3: Aluminium Slip-On Flanges
Size (mm) | Pressure Rating (PN) | Weight (kg) | Material Standard |
50 | PN16 | 0.85 | EN AW-6061 |
100 | PN10 | 1.76 | EN AW-5083 |
150 | PN16 | 2.95 | EN AW-6063 |
200 | PN25 | 4.87 | EN AW-6082 |
Explanation:
Aluminium flanges are chosen where weight reduction is crucial, such as aerospace, food processing, and lightweight fluid systems. While not as strong as steel, they are corrosion-resistant and easy to handle.Conclusion
Flanges are small components with a massive impact on system safety and efficiency. Whether you're looking for weld neck, blind, or slip-on flanges in stainless, carbon, or aluminium grades, Pipex.ai is your one-stop B2B solution.
Use our weight charts and technical filters to find the exact product you need—without leaving your desk. The future of industrial procurement is here, and it starts with smarter sourcing.